import { PetStats } from '../types/stats';
import { TimeDecayConfig, TimeSyncResult } from '../types/time';
export declare class TimeDecay {
    private config;
    constructor(config?: Partial<TimeDecayConfig>);
    /**
     * Calculate stat decay based on time passed
     * @param hours Hours that have passed
     * @param currentStats Current pet stats
     * @param isSleeping Whether the pet is sleeping
     */
    calculateDecay(hours: number, currentStats: PetStats, isSleeping: boolean): TimeSyncResult;
    /**
     * Check if pet has been abandoned (stats too low for too long)
     */
    isAbandoned(stats: PetStats, hours: number): boolean;
    /**
     * Get a message about time passed
     */
    getTimeMessage(hours: number): string;
    /**
     * Get severity level based on hours passed
     */
    getSeverity(hours: number): 'none' | 'low' | 'medium' | 'high' | 'critical';
    /**
     * Apply the decay result to stats
     */
    applyDecay(stats: PetStats, result: TimeSyncResult): PetStats;
}
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